Chapter 10: Rotational Kinematics and Energy
MCAT Study Guide



1.  

The following information pertains to questions 1 and 2.

Two children sit opposite each other on a horizontal merry-go-round. The little boy weighs 40 pounds and sits 1.0 m from the center of the equipment. The little girl weighs 25 pounds and sits 1.2 m from the center of the merry-go-round. Dad gets them going and climbs a nearby tree and crawls out onto a limb overhanging the merry-go-round to take some pictures. As dad sees the children they are turning in a clockwise way and slowing down uniformly.

The angular velocity of the little girl is ___.



2.  

The magnitude of the angular acceleration of the little girl is ___ the magnitude of the of the angular acceleration of the little boy.



3.  

The magnitude of the angular velocity of the little boy is ___ the magnitude of the angular velocity of the little girl.



4.  

At any instant, the speed of the boy tangent to the circle on which he is moving is ___ the speed of the girl tangent to the circle on which she is moving.



5.  

The angular displacement of the little boy in a particular time interval is ___ the angular displacement of the little girl in the same time interval.



6.  

The distance traveled by the little boy in a particular time interval is ___ the distance traveled by the little girl in the time interval.

Note: answer choices in this exercise are randomized.

MCAT Study Guide: From The Virtual Prof's Physics Study Guide for the MCAT, ©1997 by Glen Terrell, University of Texas at Arlington, and RonJon Publishing, Inc. Used by permission of Glen Terrell. For more information, go to http://www.virtualprof.com

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